16545638177 has 2 divisors, whose sum is σ = 16545638178. Its totient is φ = 16545638176.

The previous prime is 16545638129. The next prime is 16545638203. The reversal of 16545638177 is 77183654561.

16545638177 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16290948496 + 254689681 = 127636^2 + 15959^2 .

It is a cyclic number.

It is not a de Polignac number, because 16545638177 - 2²² = 16541443873 is a prime.

It is not a weakly prime, because it can be changed into another prime (16545638107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8272819088 + 8272819089.

It is an arithmetic number, because the mean of its divisors is an integer number (8272819089).

Almost surely, 2^16545638177 is an apocalyptic number.

It is an amenable number.

16545638177 is a deficient number, since it is larger than the sum of its proper divisors (1).

16545638177 is an equidigital number, since it uses as much as digits as its factorization.

16545638177 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4233600, while the sum is 53.

The spelling of 16545638177 in words is "sixteen billion, five hundred forty-five million, six hundred thirty-eight thousand, one hundred seventy-seven".